El Evangelio de Abadón

"To make U.S. pilots work harder during World War II, it was common among pilots to use amphetamine, which encouraged them to fight longer. The drugs worsened pilots' health and drove them crazy, but was ignored. Some goverments still encourage drug use to make their soldiers fight better".

Features:
+5 utterly different rooms;
+The maximum level you can reach is 25, and each level will give you an unique bonus;
+Original soundtrack that was made especially for this game;
+Good optimization;
+Various enemies;
+A lot of special effects;
+Abundance of achievements (more than 30);
+Use drugs as buffs.
+Difficult game